Advertisements
Advertisements
प्रश्न
In a cricket match a batsman hits a boundary 6 times out of 30 balls he plays. Find the probability that he did not hit the boundary?
उत्तर
n(S) = 30
E = { not hitting the boundary }
n(E) = 30 - 6 = 24
Probability of not hitting a boundary
∴ P(E) = `"n(E)"/"n(S)" = 24/30 = 4/5`.
APPEARS IN
संबंधित प्रश्न
An urn contains 10 red and 8 white balls. One ball is drawn at random. Find the probability
that the ball drawn is white.
A bag contains 5 red, 8 white and 7 black balls. A ball is drawn at random from the bag. Find the probability that the drawn ball is neither white nor black.
Find the probability that a number selected at random from the numbers 1, 2, 3, ..., 35 is a Multiple of 7
A number is selected at random from first 50 natural numbers. Find the probability that it is a multiple of 3 and 4.
1000 families with 2 children were selected randomly , and the following data were recorded :
| Number of girls in a family | 0 | 1 | 2 |
| Number of families | 333 | 392 | 275 |
Find the probability of a family , having
(iii) no girl
It is known that a bax of 600 electric bulbs contain 12 defective bulbs. One bulb is taken out at random from this box. What is the probability that it is a non-defective bulb?
If P (A) and P (not A) are complementary events and P (A) = 0.15, then P (not A) = ?
A school has five houses A, B, C, D and E. A class has 23 students, 4 from house A, 8 from house B, 5 from house C, 2 from house D and rest from house E. A single student is selected at random to be the class monitor. The probability that the selected student is not from A, B and C is ______.
Two dice are thrown together. Find the probability that the product of the numbers on the top of the dice is 12
2 cards of hearts and 4 cards of spades are missing from a pack of 52 cards. A card is drawn at random from the remaining pack. What is the probability of getting a black card?
